Update api_en.md

Author: qos-max

api_en.md

@@ -68,7 +68,7 @@ Include the key in the request header by filling the `key` field. Then, establis
 ## 3. Trading Instrument Codes and Trading Hours
 | Market Code | Description | Trading Hours |
 |-------------|-------------|---------------|
-| US          | US Stocks   | Normal Trading Hours (Eastern Time, ET):</br>Opening Time: 9:30 AM</br>Closing Time: 4:00 PM</br>Pre-Market Trading:</br>Start Time: 4:00 AM</br>End Time: 9:30 AM</br>After-Hours Trading:</br>Start Time: 4:00 PM</br>End Time: 8:00 PM</br>Note: The above times are in US local time. Ensure proper daylight saving time (DST) adjustments:</br> DST (usually from the second Sunday in March to the first Sunday in November)</br> Standard Time (usually from the first Sunday in November to the second Sunday in March)</br> Convert to UTC+8: During standard time, the opening is at 10:30 PM, and during DST, it’s at 9:30 PM. |
+| US          | US Stocks   | Normal Trading Hours (Eastern Time, ET):</br>Opening Time: 9:30 AM</br>Closing Time: 4:00 PM</br>Pre-Market Trading:</br>Start Time: 4:00 AM</br>End Time: 9:30 AM</br>After-Hours Trading:</br>Start Time: 4:00 PM</br>End Time: 8:00 PM</br>Night Trading: </br> Start Time: 8:00 PM </br> End Time: 3:50 AM (the next day) </br>Note: The above times are in US local time. Ensure proper daylight saving time (DST) adjustments:</br> DST (usually from the second Sunday in March to the first Sunday in November)</br> Standard Time (usually from the first Sunday in November to the second Sunday in March)</br> Convert to UTC+8: During standard time, the opening is at 10:30 PM, and during DST, it’s at 9:30 PM. |
 | HK          | Hong Kong Stocks | UTC+8 Morning Session: 9:30 AM - 12:00 PM</br>Afternoon Session: 1:00 PM - 4:00 PM |
 | SZ          | Shenzhen A-Shares | UTC+8 Morning Session: 9:30 AM - 11:30 AM</br>Afternoon Session: 1:00 PM - 3:00 PM |
 | SH          | Shanghai A-Shares | UTC+8 Morning Session: 9:30 AM - 11:30 AM</br>Afternoon Session: 1:00 PM - 3:00 PM |